Pathfinder Rover Rat??
The key to evidencing that
there are living creatures in the images from Mars
would be to find two different views of the same
area showing movement.
This could be just what we have here below
In the image above and in the left frame below is what looks to be a rodent like creature sunning itself on top of the rock called"Mini Matterhorn", right in front of the lander!
On the right below is the same rock from a different
time and point of view.
From these different points of view from the Pathfinder
and Rover, which are in these images about 110-130 degrees
in view and a couple feet in elevation
opposite,
you would still be able to see the large rounded shape
on top of the rock.
This is not the case here, and the suspected creature appears
to not be in the second image at all!
Let me assist with some visual aids
I removed the creature; the rock now looks more like its reverse view

Now let's see a b/w from the other angle
Here it is up close, I see no shape resembling the one in the rover's image.
Here's an experiment. Put your cat on top of a medium large rock, then stand there and take a b/w picture. Then move 110-130 degrees away and take another picture of the same from a prone position. You will get different sides of the same feline, but we could see said cat in both images.. unless you startled it and it ran off before you could click the button, in which case we would see only the rock. sort of like what's seen here
Ok.... Where did this go??

Of course it could just be a rock, that has a outward facing
surface that looks absolutely
rodent-like but disappears when you look at it from another vantage point.
When we take both images and scale the rocks to approximately the
same size, and then cut the so-called-Rat out of the rover image, mirror it to
simulate reversal of position and place it onto the image of the Mini-Matterhorn
taken from Pathfinder,
the result is that the top of that bare rock is
apparently not the same shape, or
size.
Now I'd like to show you two original optimized images
of the so-called-Rat,
in which it has moved slightly from original position
as the Rover got closer to it.
Check the differences between the position of its snout
and the angle of its profile.
Do you see it Ladies and Gentlemen?
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Pathfinder Oddities